v3.25.4
Pension and Postretirement Benefit Plans - Schedule of Components of Net Periodic Benefit Cost and Other Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Non-operating expense      
Total net periodic benefit cost (benefit) $ 104 $ 828 $ (109)
Postretirement benefits      
Operating expense      
Service cost 17 21 27
Non-operating expense      
Interest cost 73 80 87
Expected return on plan assets (57) (65) (77)
Amortization of transition asset 0 0 0
Amortization of prior service benefit (15) (22) (31)
Amortization of net actuarial loss 16 20 9
Settlements, curtailments, special termination benefits and other 1 1 0
Total non-operating expense (benefit) 18 14 (12)
Total net periodic benefit cost (benefit) 35 35 15
Service cost - continuing operations 17 20 23
Service cost - discontinued operations 0 1 4
Total non-operating expense (benefit) - continuing operations 18 14 (10)
Total non-operating expense (benefit) - discontinued operations 0 0 (2)
Total net periodic benefit cost (benefit) - continuing operations 35 34 13
Total net periodic benefit cost (benefit) - discontinued operations 0 1 2
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss      
Amortization of transition asset 0 0 0
Prior service cost (benefit) (144) 0 0
Amortization of prior service benefit 15 22 31
Net actuarial (gain) loss 17 (69) 100
Amortization of net actuarial loss (16) (20) (9)
Foreign currency 0 2 0
Settlements, curtailments, special termination benefits and other (1) (1) 0
Total recognized in other comprehensive (income) loss (129) (66) 122
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss (94) (31) 137
United States | Pension Plan      
Operating expense      
Service cost 102 123 171
Non-operating expense      
Interest cost 433 522 662
Expected return on plan assets (569) (714) (974)
Amortization of transition asset 0 0 0
Amortization of prior service benefit 0 (15) (24)
Amortization of net actuarial loss 277 307 292
Settlements, curtailments, special termination benefits and other 14 821 (5)
Total non-operating expense (benefit) 155 921 (49)
Total net periodic benefit cost (benefit) 257 1,044 122
Service cost - continuing operations 102 116 139
Service cost - discontinued operations 0 7 32
Total non-operating expense (benefit) - continuing operations 155 921 (32)
Total non-operating expense (benefit) - discontinued operations 0 0 (17)
Total net periodic benefit cost (benefit) - continuing operations 257 1,037 107
Total net periodic benefit cost (benefit) - discontinued operations 0 7 15
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss      
Amortization of transition asset 0 0 0
Prior service cost (benefit) 0 0 0
Amortization of prior service benefit 0 15 24
Net actuarial (gain) loss 14 (105) 495
Amortization of net actuarial loss (277) (307) (292)
Foreign currency 0 0 0
Settlements, curtailments, special termination benefits and other (14) (821) 5
Total recognized in other comprehensive (income) loss (277) (1,218) 232
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss (20) (174) 354
International | Pension Plan      
Operating expense      
Service cost 49 63 76
Non-operating expense      
Interest cost 198 200 225
Expected return on plan assets (278) (322) (307)
Amortization of transition asset 0 2 2
Amortization of prior service benefit 1 1 2
Amortization of net actuarial loss 8 11 7
Settlements, curtailments, special termination benefits and other 2 1 3
Total non-operating expense (benefit) (69) (107) (68)
Total net periodic benefit cost (benefit) (20) (44) 8
Service cost - continuing operations 49 58 60
Service cost - discontinued operations 0 5 16
Total non-operating expense (benefit) - continuing operations (69) (107) (67)
Total non-operating expense (benefit) - discontinued operations 0 0 (1)
Total net periodic benefit cost (benefit) - continuing operations (20) (49) (7)
Total net periodic benefit cost (benefit) - discontinued operations 0 5 15
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss      
Amortization of transition asset 0 (2) (2)
Prior service cost (benefit) 1 0 (1)
Amortization of prior service benefit (1) (1) (2)
Net actuarial (gain) loss 21 85 166
Amortization of net actuarial loss (8) (11) (7)
Foreign currency 26 (36) 3
Settlements, curtailments, special termination benefits and other (2) (1) 0
Total recognized in other comprehensive (income) loss 37 34 157
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss $ 17 $ (10) $ 165